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Showing posts with label lizards. Show all posts
Showing posts with label lizards. Show all posts

Thursday, August 7, 2014

coast horned lizard ~ 08/07/14 ~ Podere di Farfalla


It's August.  That means it's baby lizard time around these parts.  This one puffed itself up as I continued to follow it to the shade.  Unbothered, it can look quite flat and deflated.  Still, so tiny. Cute.  And, well camouflaged.  There's an unusual growth near its tail.  Don't know what that's about.

Can you find the horned lizard?

Friday, May 23, 2014

coast horned lizard ~ 05/23/14 ~ Pinnacles


Apparently, this cool lizard is now supposed to be called Blainville's horned lizard?  Sigh.  I can't keep up with all the name changes, scientific or common.  Eh, that's not the point of this post, anyways, even though I have seen a few impressively large horned lizards during my many recent activities.

Paul has suggested I try iNaturalist as a way to document and share what I find during my weekly Pinnacles visits.  I haven't decided yet, because I have questions about macro photo quality and GPS capability in a smart phone where there's no cell service.  Click here to see Paul's photo of this same horned lizard using his iPhone 5 (don't know which letter c or s), and then click on my photo above to enlarge.  What do you think about the photo quality comparisons?  I think Paul's appears very tan colored and a little flat, even though my depth of field is shallow.  I'll mainly be taking photos of little butterflies about the size of the lizard's head anyways, but coloring is important.  And, I'm still unsure how to resolve the pseudo-GPS in phones issue.  I heard there are GPS units that bluetooth to the phone, but what a pain and more crap to carry.  Does anyone have any suggestions to obtain accurate GPS linked to a phone-generated photo?  Are there actual GPS phones, not the fake ones reliant on cell service?

Oh, have I mentioned I don't currently have a smart phone?  I've had my flip phone since 2006, which I think is the responsible thing to be aware of in this day and age of disposable everything, including electronics.  I had my last computer for 10 years before I upgraded to iMac.  I really don't need the latest and greatest toy, but it may be time to update.  Plus, we've been needing to switch carriers for some time since many of my calls get dropped at home on the Peninsula where ocean meets spotty cell coverage.  We never had a land line.  There was a bit of a city hall brouhaha over additional cell towers being installed.  On one side were the monarch butterfly lovers who didn't want the overwintering butterflies or themselves to be radiated (is that the term?), and on the other side was the city needing to offer basic public services, like cell phone coverage for emergencies.  The towers went in, cleverly disguised as chimneys.  Are we all being microwaved now?

ps 05/30/14 -  One of the take-aways I got from the Citizen Science Session of the Ocean Science Trust Conference last month was that citizen science could and should be able to provide data rigorous enough for scientific review (Thanks, Lisa Emanuelson!).  So, when a few days later CalAcademy announced their acquisition of iNat, I paid attention.

Ken-ichi Ueda, co-founder of iNaturalist, has been kind enough to reply to my numerous criticisms (hopefully, constructive!) and questions as I figure out the best recording method(s) for my project, which in an unexpected way could also help shape its initial purpose.  With Ken-ichi's permission, here's what he said, "Ok, let's talk tech. For iNat, my recommendation is to get the latest iPhone. Our iOS app is quite a bit better than our Android app, and the iPhone's GPS and camera are great. Here's are some particulars:

IMAGE QUALITY
As you pointed out in your post, the iPhone isn't quite as good as a conventional camera, but it's still pretty good. It doesn't give you much DoF control, but it can be quite sharp, particularly for stable subjects that are close.

GPS
Any device with a real GPS chip should get coordinates *anywhere* it has a clear view of the sky, since it works by communicating with satellites, not ground-based towers. Reception may vary depending on weather, topography, or the particular configuration of satellites in line-of-sight from your position. Devices like the iPhone can improve both the speed of coordinate acquisition and the accuracy of those coordinates by using cell tower and wifi signals, but they aren't required. Almost every cell phone has a real GPS chip on board, including every iPhone and most Android phones. Note that the majority of tablets do NOT have onboard GPS. This includes the iPad.

In my experience the iPhone's GPS functionality is very accurate. If you get a chance to look over someone's shoulder, you'll see that the iNat works by continually acquiring coordinates until it gets the precision below 5m."

To keep this from becoming free advertising for phones and plans, I'm skipping some of what Ken-ichi recommends.  Then, he goes on to say, "Regarding iNat recording devices, keep in mind you don't need a phone to use iNat! You can upload images directly. My usual practice is to use my phone for most observations, but to also carry around my SLR and a handheld GPS in my pack. The GPS is always recording a track, which I use to add geotags to my SLR photos later (I use http://www.earlyinnovations.com/photolinker/ for this, but there are many other such applications, including Lightroom). The SLR is much faster and sharper, so for things like butterflies, that's usually what I'm going to use. Getting identifiable lep shots with a phone takes more time and patience than you can probably spend if you're doing a research project. Most high-end point-and-shoots would probably be as good or even better (in terms of flexibility) than my SLR setup."

Then, I asked questions about iNat itself.

I haven't found where it explains the different color map markers (red, blue, green?).
"Colors relate to the "iconic taxon" of the thing observed: blue for most animals, orange for insects / spiders / molluscs, green for plants, purple for slime molds, brown for chromists, pink for fungi. It isn't really explained anywhere. There are a lot of things on the site we just assume people will figure out for themselves."

I also don't understand how the "Redo search in map area" works, because it comes up with new and different points depending on the zoom level on the map.
"It redoes the search using the bounding box of the current map. It loads different observations because some of the observations in your previous search will be outside the bounding box."

Then, how do you select the marker that sits just below another one when on max zoom?
"I guess you don't, but you can see them all in the list on the right. You can also zoom in much farther with the satellite tiles."

Is it possible to select by week number to see everything found at a particular location in that week of any year?
"You can't look up observation by week, but you can do it by month. If you go to http://www.inaturalist.org/observations and click the "Search" button you'll see a bunch of filters, one of which is a month filter. If you set that and leave year and day blank, you'll see all the observations added in that month, regardless of year."

... He did say he privatizes his locations, does not carry a GPS unit, guesses based on a google app, so maybe that was the result of being "obscured" as well.  It doesn't seem like that should qualify for "research grade".
"... his observations for that day is due to the fact that he obscures the coordinates, which means each observation is displayed at a randomly chosen location somewhere within 10km of the true coordinates. iNat's "research" quality grade doesn't consider how precise the coordinates are, just that you've added them. The name "research" was probably a poor choice since it seems to get people's ire up, but it just means observations of that grade are probably more accurate / complete than others. Then again, the definition of "research" is pretty flexible. For some studies, precision of 50k might be adequate."

Finally, in the spirit of encouragement to become better, I had the audacity to question Ken-ichi's algorithms.  It's a bit meta, and I've noticed not everyone appreciates the different perspective.  In fact, he seemed very receptive to it.  I agreed with him that the freedom to make errors is educational, which is why this hobby blog has been so liberating for me over the past 5 years.  By being okay to make mistakes, being honest in the not knowing, asking those questions, and accepting of others' help, I have learned so much.  Here's Ken-ichi's reply to my algorithms charge:
"I would argue that our crowdsourcing approach generates data that is close to the accuracy of professionally collected data, with the added benefit that it usually comes with media evidence for independent verification. It is generally not as comprehensive as professionally collected data (most casual naturalists aren't going to identify every carabid under a log in the way that a working coleopterist would), but if you look at the inaccuracies present in supposedly professional collections at museums or in GBIF, you will find most of the same geographic biases (no collections far from roads or trails), identification mistakes, and taxonomic confusion... except it's really hard to see this errors because either there's no associated media evidence or you have look at a specimen. An actually quantitative comparison between professional and crowdsourced data collections like this would be a pretty cool outcome of being at CAS. We shall see."

This is all very helpful information for me.  Thanks, Ken-ichi!

The future of natural history documentation is at our feet, a path extending into the digital age through the eyes and hands of millions of curious participants.  I know that sounds corny, but it's true.  This is exciting stuff!  It's too bad it currently selects for the well-to-do with expensive phone requirements, GPS devices, and fancy cameras.  The reality of the situation is nature is available to pretty much everyone... and it's free, if we just put down our electronic devices.

Sunday, September 22, 2013

fence lizard ~ 09/22/13 ~ Garland Ranch

Sceloporus occidentalis bocourtii

We've had the Konica Minolta DiMAGE X50 for 9 years now, and we just discovered a new automated macro feature.  Yep.  The more we look for a new camera, the more we like the one we already have.  

Once again, I was surprised to find juvenile fence lizards this time of year.  I don't know why it's still a surprise when I've seen them at Fort Ord in August a couple times before.  When do they hatch and how big are they?

And, yes, for some reason I cannot resist picking up little lizards.

Sunday, April 7, 2013

Skilton's skink ~ 04/07/13 ~ Garland Ranch


Swoon.  Bright blue is my favorite color. The juveniles and young adults have blue tails, and when they're ready for some lovin' they turn flushy orange. They're remarkably shiny. I've seen western skinks many times before, but this was the first time I could capture a couple on camera.  I was surprised to see one retreating to a hole.  I usually don't think of lizards as being burrowing animals.

Saturday, September 29, 2012

fence lizard ~ 09/29/12 ~ Rocky Creek


I know I have fence lizards well represented on Nature ID, but this one was just so exquisite I had to post her (I think it's a female?) picture.  Click on the image to see it enlarged.  I keep taking photos of lizards with hopes one of them will eventually be a different sp.  Unfortunately, the highly variable and numerous fence lizards seem to be the most amenable to my paparazzi-like stalking. I've seen a handful of alligator lizards around, but they're a bit more camera shy.  The only other lizard spp. I've seen around these parts somewhat infrequently is the coast horned lizard and CA whiptail.

Friday, June 10, 2011

fence lizard ~ 06/10/11 ~ Pinnacles

male coast range fence lizard
Sceloporus occidentalis bocourtii

I've been debating about this ID ever since I posted another fence lizard at Pinnacles from this same trip. These two lizards look totally different from each other. I'm wondering if the one shown above might be a sagebrush lizard (Sceloporus graciosus). However, this species is supposedly not found according to the Pinnacles reptiles and amphibians list. The two Sceloporus species are difficult to tell apart without looking at the underside of the males.

Thursday, June 9, 2011

CA whiptail ~ 06/09/11 ~ Pinnacles



California whiptail
Aspidoscelis tigris munda

What a pretty lizard. I can't believe how fast they can move with that incredibly long tail that seems to follow the side to side body movement, just like a whip. One individual we saw must have been over a foot long from head to tail tip. Note the different patterns on these two individuals.

Saturday, May 14, 2011

coast horned lizard ~ 05/14/11 ~ Fort Ord

coast horned lizard
Phrynosoma blainvillii

I've said from the get-go that Nature ID does not show many of the cool things I see during hikes, nor is this blog a decent representation of what can be found on the Central Coast of California. You may have noticed I mainly post pictures of flowers, and it's NOT because I'm particularly more interested in plants than say birds or marine life. The great thing about taking pictures of plants is that they hold still, except when the wind blows. Plus, I can generally get close enough to take a decent picture. Flowers don't run, swim, or fly away. Unfortunately, sometimes the clearest pictures I get of animals is if they're dead, like this red-breasted nuthatch post. Even so, I was surprised to see this flattened coast horned lizard since this was on restricted Army Lands, and I can't imagine much traffic goes through on this road. Poor thing. Click this highlighted link to see much cuter (and alive!) pictures of juvenile coast horned lizards I found on Fort Ord BLM Lands on August 4, 2010.

Wednesday, August 4, 2010

fence lizard ~ 08/04/10 ~ Fort Ord


posted 08/14/11 - I generally think of spring as the time to see babies. Nope. This is the second year in a row that I've seen juvenile fence lizards at Fort Ord in the first half of August. And it wasn't just one or two, they were everywhere!

coast horned lizard ~ 08/04/10 ~ Fort Ord



juvenile coast horned lizard
Phrynosoma blainvillii

It was love at first sight! I'm usually not this effusive, but these juvenile horned lizards were so tiny and flat-out cute. As CA Herps states (linked in the scientific name above), the Coast horned lizards have two rows of fringed scales on the sides. Apparently, they can shoot blood from their eyes. I'm glad they didn't do that when I picked them up, because I would have felt awful for handling them. To get the spotted belly picture above, I did the "stroke the throat" trick to make it lay still. With the last picture above, it's easy to see why they are so difficult to find. Before now, I've only ever seen 1 adult male at Pinnacles 5 years ago.

ps 08/07/10 - Janet, a regular commenter on Nature ID with several blogs, has posted one of the pictures above on her tumblr account. I'm glad she let me know.

Saturday, May 8, 2010

alligator lizard ~ 05/08/10 ~ Fort Ord

California alligator lizard
Elgaria multicarinata multicarinata

Can you see it through the leaves? They move so differently than western fence lizards. While looking this up, I was amazed to see this video on CA Herps of the detached tail flailing about. How does it do that without being attached to the body and brain?

Sunday, March 7, 2010

Coast Range fence lizard with a tick
Sceloporus occidentalis bocourtii

This fellow was pretty content sunning himself on a bridge and didn't seem to mind me taking pictures so close. Since I've added so many posts recently, I'm starting to get lazy and not actually look things up for scientific name and links to info sites. It's probably a run of the mill western fence lizard, but I have such a hard time identifying them.

ps 05/04/10 - Thanks to a series of blog comments, I started looking into my lizard IDs. What confused me before was trying to ID for Mariposa and San Benito Counties where there are other species, and I tend to make things harder than they need to be. I'm fairly confident about this ID, a subspecies of the western fence lizard.

So, what got me looking into this, was John Wall's tick post. He provided a link to one of his pics of a lizard with ticks on it! Way cool! I reveiwed my lizard pictures and wouldn't you know it, I think the one above has a tick, too! Thanks to my handy dandy new iMac, I can zoom in on the picture. Or is that just some odd lizard anatomy where an ear should be? I had a hard time finding any solid information on lizard ears. Everything is so generalized that the information really isn't information at all. I did find this odd site Absolute Astronomy that actually said the ticks like to feed near the lizard ears. One last note, apparently when ticks feed on lizards, the Lyme disease bacteria dies. Why?

Saturday, August 8, 2009

fence lizard ~ 08/08/09 ~ Fort Ord


coast range fence lizard
Sceloporus occidentalis bocourtii

The juvenile lizards were out in abundance during this hike (sadly, I'm posting 8/29 and have many more pics to post since 8/8). The lizards were very easy to catch. LOL! During a Jay Leno show a couple of years ago, a young girl showed how you could rub their throats to bellies to make them lay still for you; that's what I did for the second photo.

I give up, for the moment, in trying to accurately identify these lizards. Most likely, it would be safe to assume it's a fence lizard subspecies. See my other reptile posts (1 and 2) for my continuing confusion. In the link I provide in the scientific name above, I got even more confused over pictures of lizards that don't look anything like each other, but the site is the best one I've found on CA reptiles so far. (Maybe it says something about herp people in general? No offense, but while studying entomology, I found the Odonata and Hymenoptera fellows behaved startling like the insects they so loved! Give me a quiet lep anytime ; )

ps - I'm beginning to appreciate how all my photos of my hand show off my genetically short pinky finger. I'm still waiting for a geneticist to remind me which x-some this unusual characteristic resides.

ps 06/25/11 - Californiaherps.com has made some great improvements since I began looking up lizards 2 years ago. I've added the subspecies in the ID above and am fairly sure I can recognize coast range fence lizards now. It was unfortunate that my first lizard ID was a dark form and possibly a sagebrush lizard.

Wednesday, May 13, 2009

Great Basin fence lizard ~ 05/13/09 ~ Yosemite

best guess Great Basin fence lizard
best guess Sceloporus occidentalis longipes

As with the other lizards, I'm making my best guess as to ID. This lizard held quite still while I took numerous pictures of it. That's probably not the best thing for it to do since it looks like it lost some of its tail. I really liked the blue patches along its back and yellow patches on its throat and toes.

ps 05/04/10 - I had originally ID'd this as a Sierra fence lizard (Sceloporus occidentalis taylori), but I looked into it some more and we weren't at high enough elevations as this pic was taken near Mirror Lake.

Thursday, April 16, 2009

western fence lizard
Sceloporus occidentalis

I know very little about lizards and initially guessed this was the very common western fence lizard. I looked at the range maps, but nothing near Pinnacles looked quite like the one shown above. There's so much variation in appearance within a lizard species/subspecies. Solely based on appearance, I think this could be a southern sagebrush lizard (Sceloporus graciosus vandenburgianus). However, this is not the sagebrush subspecies found in the area, nor is the species listed on the official Pinnacles herps list, so I'm keeping the western fence lizard ID.

Don't know if this was hanging around the big pile of poop for a reason or not.

ps 06/25/11 - I've edited the text above to reflect a better understanding of lizard species uncertainty.

Saturday, April 8, 2006